diff --git a/OpenRA.Game/Map/Map.cs b/OpenRA.Game/Map/Map.cs
index f89442f0e9..e336dca993 100644
--- a/OpenRA.Game/Map/Map.cs
+++ b/OpenRA.Game/Map/Map.cs
@@ -107,7 +107,7 @@ namespace OpenRA
 		MissionSelector = 4
 	}
 
-	public class Map
+	public class Map : IReadOnlyFileSystem
 	{
 		public const int SupportedMapFormat = 8;
 
@@ -1174,5 +1174,26 @@ namespace OpenRA
 		{
 			return FindTilesInAnnulus(center, 0, maxRange, allowOutsideBounds);
 		}
+
+		// Placeholders for future implementation
+		Stream IReadOnlyFileSystem.Open(string filename)
+		{
+			return Game.ModData.DefaultFileSystem.Open(filename);
+		}
+
+		bool IReadOnlyFileSystem.TryGetPackageContaining(string path, out IReadOnlyPackage package, out string filename)
+		{
+			return Game.ModData.DefaultFileSystem.TryGetPackageContaining(path, out package, out filename);
+		}
+
+		bool IReadOnlyFileSystem.TryOpen(string filename, out Stream s)
+		{
+			return Game.ModData.DefaultFileSystem.TryOpen(filename, out s);
+		}
+
+		bool IReadOnlyFileSystem.Exists(string filename)
+		{
+			return Game.ModData.DefaultFileSystem.Exists(filename);
+		}
 	}
 }
diff --git a/OpenRA.Game/ModData.cs b/OpenRA.Game/ModData.cs
index a985c04db9..c00871eef7 100644
--- a/OpenRA.Game/ModData.cs
+++ b/OpenRA.Game/ModData.cs
@@ -164,12 +164,11 @@ namespace OpenRA
 
 			// Operate on a copy of the map to avoid gameplay state leaking into the cache
 			var map = new Map(MapCache[uid].Path);
-			var fileSystem = DefaultFileSystem;
 
 			LoadTranslations(map);
 
 			// Reinitialize all our assets
-			InitializeLoaders(fileSystem);
+			InitializeLoaders(map);
 			ModFiles.LoadFromManifest(Manifest);
 
 			// Mount map package so custom assets can be used.
@@ -183,9 +182,9 @@ namespace OpenRA
 			// Load music with map assets mounted
 			using (new Support.PerfTimer("Map.Music"))
 				foreach (var entry in map.Rules.Music)
-					entry.Value.Load(fileSystem);
+					entry.Value.Load(map);
 
-			VoxelProvider.Initialize(VoxelLoader, fileSystem, Manifest.VoxelSequences, map.VoxelSequenceDefinitions);
+			VoxelProvider.Initialize(VoxelLoader, map, Manifest.VoxelSequences, map.VoxelSequenceDefinitions);
 			VoxelLoader.Finish();
 
 			return map;